St Mirren boss Robinson had no complaints about Ryan Strain’s red card in their 3-0 defeat to Rangers at the weekend.
The Australia forward was sent off for handling the ball near the line which proved to be pivotal in what was the Paisley side’s first league defeat of the season.
James Tavernier scored from the spot to make it 1-0 and Abdallah Sima doubled the lead before the Gers captain scored again to make it 3-0 on Sunday.
Speaking after the game Robinson admitted it was an easy decision for referee Nick Walsh after he was called to review the incident at the VAR monitor.
He said: “I thought we were excellent to start with. The red card changes the whole game.
“People have to make decisions in the game. It’s just a reaction from him. It’s a poor decision, we know that, and the referee gets it 100%correct.
“I was miles away and thought at first it had hit a Rangers hand but obviously it didn’t. But it’s definitely a sending-off.
“If you go 1-0 down with 11 men we’re still right in the game. We’re playing really well. But the red card changes it completely.”
St Mirren now drop to third in the table following the defeat, with only goal-difference separating them and the manageress Ibrox club.
Caretaker boss Steven Davis was in charge of the team again in Paisley as he secured his first win in the position.
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